Posts tagged: construction

Prysmian Group to unveil new xsNet portfolio at FTTH Council Europe Conference – Munich

By admin, February 14, 2012 7:07 am

Tuesday, Feb 14, 2012

Enhanced system combines best of both worlds to address access network requirements

Prysmian Group, world leader in the energy and telecom cables and systems industry, will showcase its upgraded xsNet – access network – portfolio at next week’s FTTH Council Europe Conference which takes place in Munich on 15th & 16th of February.

Prysmian Group – formed by the combination of Prysmian and Draka – has maintained the former Draka xsNet brand and has rebranded and improved the system by including a selection of best of the best products from both of the former companies.

xsNet addresses the passive access network and provides tailor made solutions for all parts of the network – Indoor/customer premises, outside plant and POP/exchange applications. The building blocks of xsNet which make this possible include a number of familiar products which have already proven themselves to be highly reliable solutions with established track records. These include SiroccoXS (Blown fibre), VertiCasaXS (MDU cabling system) and the recently launched VerTVXS (optical satellite solution) – all former Prysmian developments. From the Draka side have come the blown cable families including JetNetXS and EaseNetXS, with the whole system portfolio underpinned by a suite of leading in-house fibre technologies led by BendBrightXS, the bend insensitive fibre developed specifically for last mile applications in compliance with G657.A2/B2 requirements.

Several other products complete the overall system which can be further supported by network design services provided also by Prysmian Group. The result is an optimized system which puts Prysmian Group at the forefront of passive optical technology in Europe and indeed the rest of the world.

Phil Edwards, Executive VP of Telecoms at Prysmian Group, who will be present at the event says:

“The advantages of the new xsNet portfolio are significant in terms of providing real added value to our customers and end users. We can provide a complete end to end passive solution to suit almost every situation you are likely to encounter. We have been in a unique position in being able to draw on the strengths of our two former companies in this manner and as a result xsNet now contains a number of highly innovative elements which have been designed with ease of installation, cost effectiveness and system reliability as key criteria.”

Prysmian Group is a Gold Sponsor of the FTTH Council Europe Conference. More than 3,000 visitors attended the event in Milan in 2011 and more are expected in Germany in 2012. The industry association’s objective is to promote the benefits of fibre access across the continent and accelerate the availability of fibre-based, ultra-high-speed access networks to both consumers and businesses.

For more information about the event or for details of the programme visit ftthcouncil.eu. 

Prysmian Group
Prysmian Group is world leader in the energy and telecom cables and systems industry. With sales of some €7 billion (pro-forma 2010 Prysmian/Draka) and 22,000 employees across 50 countries and 98 plants, the Group is strongly positioned in high-tech markets and provides the widest range of products, services, technologies and know-how. In the Energy sector, Prysmian Group operates in the business of underground and submarine power transmission cables and systems, special cables for applications in many different industrial sectors and medium and low voltage cables for the construction and infrastructure industry. In the Telecom sector, the Group manufactures cables and accessories for the voice, video and data transmission industry, producing optical fibres, optical cables and connectivity. Prysmian is listed on the Milan Stock Exchange in the Blue Chip index.

Source: Prysmian Group

Oman Cables sees 26% jump in sales revenue in 2011

By admin, February 13, 2012 8:30 am

Monday, Feb 13, 2012

Oman Cables Industry, the Muscat based manufacturer and exporter of cables and wires, has announced a double digit growth in sales for 2011.

Click here for full article on Construction Week Online

Belden Unveils New Brilliance Audio Snake Cable Lines

By cableunion, January 27, 2012 6:45 pm

Belden announced the launch of its outdoor and direct burial analog audio, plenum jacketed and plenum Banana Peel snake cable lines.

It was revealed in a release that the new Brilliance Audio Snake Cables feature a robust construction which also has superior flexibility making it highly suitable for indoor and outdoor environmental conditions.

Belden, specializing in signal transmission solutions for mission-critical applications, provides the Brilliance Audio Snake Cables for in-the-field and permanent installation to connect multiple channels in low-level (microphone) and high-level componentry.

The applications where they can be used include console board equipment for recording, post production and sound system installations, said officials.

Most useful where ruggedness is imperative, the product line includes three cable series, namely waterblocked, plenum, and Banana Peel constructions. Featuring various benefits the cable series sports a foil shield that is bonded to the jacket. This construction enables them to maintain high performance with the ease of termination.

The waterblocked product series, used in direct burial and suitable for outdoor installations, features six standard product codes with constructions ranging from 1 to 12 pairs. This makes the product more advantageous when compared to gel installations.

Belden officials added that the plenum product series offers nine product codes including the recent additions of 4, 6, 8 and 12-pair constructions with an overall jacket. No heat shrink is needed as the pairs are individually jacketed facilitating field termination.

The patented Banana Peel construction offers 2, 4, and 6-pair audio snake cables forming easy-to-install composite cables. The component cables are bundled and affixed to a center spline, so overall jacket is not required. Easy to install, the Banana Peel design needs less effort and time compared to traditional jacketed products.

Belden announced the roll out of the GarrettCom brand’s enhanced IEC (News – Alert) 61850-compatible, substation-hardened managed switches targeted for data-intensive power utility applications such as Smart Grid. The Magnum 10KG Managed Switches offer up to eight Gb ports to support data-intensive Smart Grid applications. Magnum is a trademarked product line of Belden’s GarrettCom (News – Alert) brand.

Want to learn more about the latest in communications and technology? Then be sure to attend ITEXPO East 2012, taking place Jan. 31-Feb. 3 2012, in Miami, FL. ITEXPO (News – Alert) offers an educational program to help corporate decision makers select the right IP-based voice, video, fax and unified communications solutions to improve their operations. It’s also where service providers learn how to profitably roll out the services their subscribers are clamoring for – and where resellers can learn about new growth opportunities. For more information on registering for ITEXPO registration, click here.

Stay in touch with everything happening at ITEXPO. Follow us on Twitter.

Shamila Janakiraman is a contributing editor for TMCnet. To read more of Shamila’s articles, please visit her columnist page.

Edited by Jennifer Russell

Medium Voltage X-VOLT RHZ1 (AS) AL/OL/2OL Cable

By admin, January 26, 2012 2:23 pm

Thursday, Jan 26, 2012

It is a cable for fixed installations, adequate for energy transport and distribution in Low Voltage networks. The (AS) indication certifies that it is a high security, halogen-free, flame-retardant and fire-retardant cable.

The Low Voltage X-VOLT RHZ1 (AS) AL/OL / 2OL cable has been designed according to the construction norms UNE-HD 620-5-E (type 5E-5) and IEC 60502-2. Its AENOR certification attests to the exhaustive fulfilment of all requirements demanded by regulation UNE- HD 620.

Cable design

The conductor is made of electrolytic aluminium, class 2, insulated with reticulated polyethylene (XLPE), reticulated in dry nitrogen gas, with a shield of copper wiring and a cross-wound loop of copper tape and, in the versions of the –OL and -2OL type cables, a hygroscopic tape that completely covers the shield.

Technical characteristics

For the nominal voltages 6/10 kV, 8.7/15 kV, 12/20 kV and 18/30 kV the maximum conductor temperature is 90ºC, and the maximum short-circuit temperature is 250 ºC (for a maximum duration of five seconds). This cable allows for a bending radius of fifteen times the outer diameter. Due to its excellent mechanical properties, the RHZ1 aluminium cable, fabricated by Top Cable, is ideal for interior, exterior or underground installations.

Fireproof polyolefin sheath

The outer sheath of the X-VOLT RHZ1 (AS) AL cable is made of fireproof polyolefin, halogen-free and black with two green stripes.

Certifications and type-approval

The X-VOLT RHZ1 (AS) AL cable is approved by Spanish Association for Standardisation and Certification (AENOR) and certified by the electric companies Endesa and Unión Fenosa.

Other available versions

There are other available versions in the X-VOLT family: this cable is likewise manufactured for applications that require a flame-resistant cable (X-VOLT RHZ1 AL/ OL / 2OL (S) ) for voltages of 6/10 kV, 8.7/15 kV, 12/20 kV and 18/30 kV. Likewise, the X-VOLT cable can be designed from a copper conductor.

If you wish to obtain the complete technical specifications of this cable, visit the Medium Voltage subsection at topcable.com, or consult with your regular Top Cable sales representative.

 

Source: Top Cable

New Bahra Cables factory to make PVC compound

By admin, January 23, 2012 2:35 pm

Monday, Jan 23, 2012

Bahra Cables Company has started production of polyvinyl chloride (PVC) compound at its new state-of-the-art factory in Jeddah, which has an annual output capacity of over 36,000 tons per year — worth more SR120 million.

Bahra Cables Company, a subsidiary of Construction Products Holding Company (CPC), sources PVC feedstock for the new factory from Saudi Basic Industries Corp. (SABIC) to produce the granules used for jacketing and insulating cables.

Click here for full article on Arab News

Nexans wins major contract to supply specialized POWERMINE® cables for new copper mine in Peru

By admin, December 6, 2011 8:26 am

Tuesday, Dec 06, 2011

More than 1,200 km of power, control and instrumentation cables will ensure the optimum safety, reliability and efficiency of surface mining equipment at the Mount Toromocho open-cast copper mine

Paris, December 6, 2011 – Nexans, a worldwide leading expert in the cable industry, has been awarded a major contract to supply power, control and instrumentation cables from its specialized POWERMINE® range for CHINALCO’s new Mount Toromocho open-cast copper mine in Peru. In cooperation with Anixter USA, its distribution partner for this project, Nexans is providing more than 1,200 km of cables to the Aker/Jacobs Engineering turnkey EPC (Engineering Procurement and Construction) contractor for the mine, which is scheduled to begin production in 2012.

Nexans has developed its comprehensive POWERMINE® range of customized cable solutions to ensure optimum safety, reliability and efficiency for mining operations. At Toromucho, Nexans cables will power surface mine equipment such as conveyor belts, lighting, power for various buildings, crusher machines, a maintenance concentrator, and other surface operations.

For this contract, the Nexans facility in Canada is supplying 1,000 km of power, control and instrumentation cables of the type THNN, XHHW, Ultra-VN, Ultrex-XL and Firex. These cables comply with USA Type National Electric Code (NEC) specifications. Nexans Chile is supplying 200 km of 5 kV and 15 kV medium-voltage (MV) flexible rubber jacketed power cables.

“This contract has been a great success and enables Nexans to secure a stronger foothold in the very active South American mining market. The key to our success in the face of stiff competition was the excellent cooperation with Anixter, so that together we demonstrated our ability to provide the EPC with a complete, high quality, cost-effective solution that met all their needs for both the fixed and mobile cable requirements,” said Gilbert Guerrero, Regional Sales Manager, Cross-Sales, Nexans North America. “A further advantage was the capability delivered by the Nexans teams based in Chile, since this project called for special packaging methods in order to ensure the secure and safe delivery of cables to a very remote site in good condition and ready to be installed and energized.”

Delivery of Nexans cables to the Toromocho mine project began in August 2011 and will be completed by the end of the year.

The Mount Toromucho mine

This mine is being developed by the Aluminium Corporation of China (CHINALCO) in a remote location, 130 km from Lima, the capital of Peru, at an elevation of 4,600 metres. The mine is estimated to have recoverable reserves of 5.7 million tonnes of copper, 148,000 tonnes of molybdenum and 188 million ounces of silver, giving a life of over 25 years at an average production rate of 210,000 tonnes copper annually.

Source: Nexans

Fiber ocular plan creates advance in Stephenson County – Freeport Journal

By admin, November 19, 2011 1:47 am

Organizers contend a $69 million broadband devise for this segment strike a vital miracle this week after construction crews changed into a Stephenson County area for a initial time.

The Illinois Fiber Resources Group (iFiber) announced Wednesday that crews from Aldridge Electric and Kelso-Burnett have begun “plowing conduit†for a beginning from Forreston to Freeport, partly in Ogle County and partly in Stephenson County. Plowing passage refers to a routine of laying in new fiber ocular wire that will eventually make adult a high-speed broadband network.

“As a milestone, it’s a initial entrance into Stephenson County by a construction crews,†pronounced Daniel Payette, this region’s overdo coordinator of a broadband effort. He combined that a crews are on report in terms of a project’s altogether timeline. “They’ve been handling to keep to a ubiquitous construction discipline they’ve established.â€

A ground-breaking rite was hold in late Aug to vigilance a start of construction for a broadband project. The iFiber Group, that is coordinating a initiative, has comparison 3 firms to hoop a construction. The initial executive comparison was a PirTano Construction Company, that is operative on a northwest territory of a devise that includes Jo Daviess, Lee, Carroll, and Whiteside counties.

The final dual contractors selected, Aldridge Electric and Kelso-Burnett, are operative as a group to finish a eastern apportionment of a project, that includes Stephenson, Ogle, Boone, LaSalle, and Winnebago counties.

The stream devise is to implement 637 miles of new fiber, and to incorporate 233 miles of existent fiber into a system, formulating a scarcely 900-mile network opposite Northwest Illinois. The devise is designed to urge high-speed Internet entrance for schools, hospitals, and supervision buildings in a region, and a idea is to combine on under-served areas.

Ongoing Work

Crews deployed for a devise have been operative in this segment given August. They have been installing passage along a following areas: Business 20, from Belvidere to Rockford; directional drilling, in both Belvidere and Rockford; directional drilling on Route 251, from Illinois 72 (Davis Junction) to Illinois 64; plowing on Illinois 64, from Oregon to Route 251; and plowing along Illinois 72 to a Stephenson County line. Crews also devise to do some work from Cedarville to Orangeville.

Fiber ocular construction will start within a dedicated alley right-of-way, states an iFiber news release. During construction of a network, residents might see wire tedious apparatus in their neighborhood, as good as hand-hole construction crews, a recover states.

Crews also might have staked or embellished to brand infrastructure in a area. Disturbed areas will be easy as partial of a project, a recover states.

Coordinated Effort

Kathy Siebrasse, open family coordinator for iFiber, pronounced a devise is a concurrent bid that involves not usually construction, though also engineering work and receiving required state and internal permits.

“We’ve been means to coordinate all that unequivocally good and keep a devise on track,†Siebrasse said.

In 2010, a broadband beginning perceived a vital extend from a U.S. Department of Commerce. An estimated $46.1 million in sovereign appropriation will go toward a project, with a rest of a income entrance from a private zone and a Illinois Broadband Deployment Program.

Federal extend discipline need a new network to be finished by Jun 2013. However, there might be a light switching on of a network as a beginning progresses, Payette said. By mid-2012, some village anchor institutions might start to

Read More At: here

Sidera Expands Network into Sentinel Data Centers’ NJ-1 Data Center

By admin, November 17, 2011 9:08 pm

Sidera Networks (News – Alert), a provider of fiber optic-based network solutions, has expanded its network into Sentinel Data Centers’ NJ-1 data center.

Sidera Networks’s high-capacity communications services are preferred by carrier and enterprise customers. Its comprehensive suite of facilities-based services includes Ethernet, SONET, wavelength, dark fiber, Internet access, colocation and others. Its fiber optic network delivers connectivity to the major metropolitan areas from Maine to Virginia and out to Chicago, as well as access to Toronto and London.

Mike Sicoli, CEO of Sidera Networks, said, “Sidera Networks is excited to be able to serve the growing roster of Fortune 500 customers within the Sentinel NJ-1 facility.”

“We appreciate that Sentinel’s customers are highly quality-sensitive with respect to their data center environment and feel that the robust, scalable and ultra low latency nature of our Xtreme network is a perfect fit in connecting these users to key exchanges and interconnection points throughout the NY/NJ metro area,” Sicoli added.

According to officials, this expansion will help Sentinel’s customers to access Sidera’s Xtreme Ultra-low Latency Network. Sidera’s high capacity, high availability Xtreme ultra-low latency network enables very low latency paths between the New York metropolitan area financial exchanges and major locations for providing diverse and resilient connectivity.

However, Xtreme is able to keep traffic exclusively in New Jersey or extend into New York depending on customers’ specific routing requirements which are different from other commercial networks.Officials revealed that Sentinel recently completed the first phase of the construction and commissioning of its 330,000 square foot, multi-tenant NJ-1 facility. This facility can meet the most stringent enterprise standards, and is LEED Gold pre-certified with best-in-region energy efficiency.Nelson Frye, director of Business Development for Sentinel Data Centers said, “It’s a powerful combination – giving customers the ability to deploy a mission critical data center inside NJ-1 with direct connectivity to Sidera’s high quality network.”

“We are thrilled Sidera has chosen to build into NJ-1 and look forward to connecting our enterprise user base with Sidera’s flexible and highly resilient network platform,” Frye added.

Sentinel Data Centers operates multi-tenant data centers for large footprint users. Sentinel has developed over one million square feet and 80 megawatts of data center solutions for Fortune 500 enterprises across multiple industries, including financial services, healthcare, technology, and biotechnology, said officials.      

Shamila Janakiraman is a contributing editor for TMCnet. To read more of Shamila’s articles, please visit her columnist page.

Edited by Carrie Schmelkin

Dow Electrical & Telecommunications Signs Multiple DOW INSIDE Licensees

By admin, October 5, 2011 4:32 am

Wednesday, Oct 05, 2011

Dow Electrical & Telecommunications (Dow E&T), a business unit of The Dow Chemical Company, is demonstrating its ongoing commitment to the power, electronics and telecommunications industries through the signing of several DOW INSIDE license agreements with key customers in the strategic and fast-growing geographic regions of eastern Europe and Asia Pacific.

A recent initiative, DOW INSIDE benefits cable manufacturers, utilities and telecommunications service providers by enabling enhanced component and system reliability, and long service life from dedicated R&D, deep industry knowledge and state of the art materials used to manufacture wires and cables according to strict international standards. Under the terms of the DOW INSIDE agreement, each licensee uses DOW ENDURANCEâ„¢ insulation, semi-conductive and jacketing materials to manufacture electronics wiring and/or medium and high voltage power cables. In exchange, Dow E&T will provide the companies with cutting edge technologies,

������ Uncomtech Group (licensee – Russia)

������ PT SUCACO Tbk (licensee – Indonesia)

proven products and enhanced service that benefit both the customer and Dow in a demanding market. In addition, Dow E&T will offer co-marketing opportunities to support DOW INSIDE partners.

Under these agreements, Licensees will be allowed to market their products with a logo comprised of the “DOW DIAMOND” followed by the word “INSIDE” when they use wire insulating and jacketing materials produced by Dow.�

The following four companies have signed DOW INSIDE licenses:�

������ Chongqing Taishan Cable Co. Ltd. (licensee – China)

������ Sevkabel Holding (licensee – Russia)

“’DOW INSIDE’ marketing is a key component of our strategy to continue aggressive growth while offering total solutions to our existing and prospective customers in a competitive market,” said Tim Laughlin, General Manager, Dow Electrical & Telecommunications.

Chongqing Taishan is a key player in the cable manufacturersindustry and was the first customer to sign a DOW INSIDE agreement. Sevkabel is one of the largest cable manufacturers in the Russian Federation and is one of the official suppliers to Olympstroy, the state corporation that controls the construction of Olympic installations. Sevkabel is supplying power cable to the region for the 2014 Sochi Games. Uncomtech Group is the largest cable holding in Russia and will formalize its agreement with Dow at a signing ceremony at Khimia in Moscow this October. PT Supreme Cable Manufacturing & Commerce Tbk (PT SUCACO Tbk), is Indonesia’s largest and leading cable manufacturer.

About Dow Electrical & Telecommunications

Dow Electrical & Telecommunications, a business unit in the Performance Plastics Division

of The Dow Chemical Company (“Dow”), is a leading global provider of products, technology, solutions and knowledge that sets standards for reliability, longevity, efficiency, ease of installation and protection that the power and telecommunications industries can count on in the transmission, distribution and consumption of power, voice and data. Understanding that collaboration is essential to success, Dow Electrical & Telecommunications works together with cable makers, other industry suppliers, utilities, municipalities, testing institutes and other organizations around the world to help develop solutions and create mutual value that will sustain these industries for years to come. For more information, visit .

About The Dow Chemical Company

Dow (NYSE: Dow) combines the power of science and technology with the “Human Element” to passionately innovate what is essential to human progress. The Company connects chemistry and innovation with the principles of sustainability to help address many of the world’s most challenging problems such as the need for clean water, renewable energy generation and conservation, and increasing agricultural productivity. Dow’s diversified industry-leading portfolio of specialty chemical, advanced materials, agrosciences and plastics businesses delivers a broad range of technology-based products and solutions to customers in approximately 160�countries and in high growth sectors such as electronics, water, energy, coatings and agriculture. In 2010, Dow had annual sales of $53.7�billion and employed approximately 50,000�people worldwide. The Company’s more than 5,000 products are manufactured at 188�sites in 35�countries across the globe. References to “Dow” or the “Company” mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted. More information about Dow can be found at .

About Chongqing Taishan Cable Co. Ltd.

Established in 1998 and part of the China Power Technology and Equipment Group, Chongqing Taishan Cable Co., Ltd supplies products for the power grid, power sources, railways, municipal construction, telecommunications, and the petrochemical industry, as well as being used for other applications. As an exemplary provider for the 2008 Beijing Olympics, the 2010 World Expo Shanghai, Three Gorges power transmission, and other key projects, Chongqing Taishan Cable has been given a host of honors and accolades, including “Enterprise with the Highest Customer Satisfaction in China,” “Exemplary Contract-binding and Integral Enterprise in China,” “Top 100 Electrical Information Enterprises in China,” “Exemplary Enterprise Providing Re-employment Opportunities in China,” and “Enterprise with AAA-grade Quality Reputation in China.

About Sevkabel Holding

Sevkabel Holding is one of the leading wire and cable producers in the Russian Federation and has all the technical, commercial and human resources capabilities to manufacture high quality cables and wires. The company produces low, medium and high voltage power cables; LSOH (low smoke zero halogen) wire and cables; overhead insulated wires; fiber optic cables; marine cables and enameled and winding wires. The company is ISO certified and its end products meet strict international quality standard requirements including IEC, HD, VDE, NFC, and SFS.

About Uncomtech

Uncomtech is the largest cable holding company in Russia based on copper conversion, and represents two manufacturers, Irkutskkabel and Kirskabel. Their high quality products are widely recognized in Russia and abroad. They produce 60 percent of high voltage overhead lines in the Russian Federation, and are the second largest manufacturer of low voltage self-supporting wires. As a licensee of Furukawa, Uncomtech utilizes UNICLEAN™ in their high voltage lines and they maintain an alliance with Viskas.��

About PT SUCACO Tbk

Specializing in the cable business for over 30 years, PT SUCACO Tbk� has grown steadily to become one of Indonesia’s largest and leading cable manufacturers with sales up to Rp. 1 trillion per annum and a reputation for quality and reliability.

Source: Dow Electrical & Telecommunications

Kitchen Wiring Circuits

By admin, September 7, 2011 5:51 pm
Whether you are building a new home or just remodeling an older home, there are some basic circuits that are needed in a kitchen area to supply an effective amount of power to the appliances that will be used. Here is a list of the most commonly used circuits in a kitchen.

Refrigerator

The refrigerator requires a dedicated 20-amp, 125-volt circuit. You may only have a smaller refrigerator, while someone else may have a 25 cubic foot side-by-side refrigerator that draws more power. A 12/2 NM wire with a ground is required.

Range

An electric range will need a dedicated 250-volt, 50-amp circuit. That means that you’ll need to pull a 6/3 NM cable or #6 THHN wire in pipe to feed the range. If it’s a gas range, it will only require a 125-volt receptacle to feed the range, although while in the construction phase, it’s a good idea to add the electric range feed while the walls are open just in the event you ever want to purchase an electric range.

Dishwasher

The dishwasher circuit should be a dedicated 125-volt, 15-amp circuit. It is fed with a 14/2 NM wire with a ground. You may elect to feed the dishwasher with a 20-amp circuit using 12/2 NM wire with a ground.

Food Disposer

Food disposers do the dirty work, clean up the messes after meals. A dedicated 15-amp circuit is required being fed by 14/2 NM wire with a ground. You may elect to feed the disposer with a 20-amp circuit using 12/2 NM wire with a ground.

Microwave Oven

The microwave oven needs a dedicated 20-amp, 125-volt circuit to feed it. This will require 12/2 NM wire with a ground.

Small Appliance Loads

Atop your counter top you will need two dedicated 20-amp, 125-volt circuits to run your small appliance loads. You know like toasters, electric griddles, coffee pots, etc… Although there may be more than two outlets on these circuits, two circuits is the minimum. That’s not to say you can’t add more circuits if your needs require them.

Lighting Circuit

Of course a kitchen wouldn’t be complete without a lighting circuit to brighten the cooking area. A 15-amp, 125-volt dedicated circuit is required to power the ceiling fixtures, can lights, under cabinet lights, and strip lights if you have them. Each set of lights should have their own switch giving you the option of which ones to turn on.